Method of forming rings



.l. H. STONE.

METHOD OF FORMING RINGS.

FILED NOV.23, 1918.

Jan. 16, 1923. 1,442,240.

Patented Jan. 16, 1923.

U ED STATES H. -ST01\TE,OF CRANSTON, RHODEISLAND.

' g I mn'rrron orroniurne nines.

Application filed November 23', 1918. "Seria1'I T0 m y I e Toallwhomz't'may 00mm:

I Be it known that I, JOHN H. vSuro'rrn, a citizen of the United States,and resident of Edgewood, city of Cranston, in'the county of Providenceand State of Rhode Island, have invented certain new and usefulImprovements in Methods of Forming Rings, of which the following is aspecification.

This invention relates to. rings more particularly designed, forpersonal wear, and has for its object to provide an improvedconstruction of a so-called shell form of ring; also an improved methodby which such a ring is formed, the ring being made of two continuousbands of very thin stock, one of which is trough-shape on its innersurface and both of which are connected together, thereby forming a ringthat is strong and durable and that is made of precious metal and of thevery minimum amount of stock.

With these and other objects in view, the invention consists of'certainnovel features of construction, as will be more fully described, andparticularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1is a side elevation showing a ring of my improved. construction.

Figure 2--is a perspective view of a piece of tubing from which theouter band of my improved ring is formed.

Figure 3is a perspective view showing a section cut from the tube fromwhich my outer band is formed.

Figure 4shows the outer band as bent or shaped into a concave-convexform.

Figure 5'shows a plurality of these outer concavo-convex bands mountedupon a tube and spaced apart at intervals along the same.

Figure 6is a sectional view showing the edges of the outer band assecured to those of the inner band thus forming a shell ring or one inwhich the ring band is hollow.

Figure 7-is a sectional view illustrating a set of bending dies in openposition, employed for shaping the outer ring band into concavo-convexform, the die being shown open with the band positioned therein ready tobe shaped when the dies are forced together.

Figure 8shows the dies as having been closed and the band as bent intothe de-' sired form by the closing action of these dies.

' R 'eferring to the drawings, 10' designates a seamless tube ofprecious metal, whichis drawn up from'aflisk intojanelongated I thimble'o f thereduired' diameter? I next cut by a saw, or'otherwis'e, anarrow-band member 11 from this" tube and place this band between thetwo dies 12 and'13 which are hollowed out preferably-as at 14 and 15 intothe shape in which this band member is designed to be pressed, asillustrated in Figure 8. These dies are then forced tof', I gether intothe position illustrated in'Fig- I 3 ure 9, causing the band to take theshape of the cavity in the die.

of an oval shapeas at 16 or concavo-convex in cross section, but theband may be shaped on its outerside into any, desired form, to producerings of difierent styles,

I have shown theband thus formed to'be The next operation is to draw upanother tube or thimble 17 from a disk of precious metal. ingconsiderably smaller than that of the first tube. The inner diameter ofthe tube from which the inner bands are constructed is of the sizedesigned to determine the rated size of .the ring and its outer diameteris justsufiicient to fit inside of the-inner edges of the outerconcavo-convex bandlfi previously formed. I then slip a plurality of Thediameter of this second tube bev This burnishing of serves to completelycover the seam, renderin% it quite invisible.

y this construction the two different bands 16 and 18 of the ring may beformed of precious metal of but a few thousandths of an inch inthickness or about the thickness. of an ordinary sheet of writing paper,and v by shaping the outer band in an oval form and permanently securingit to the inner band the whole is madeextremely stiff and strong. A ringso formed is very durable and at the same time is extremely light inweight and while it may be properly sold for 1 an all-gold ring yet itpossesses the very minimum amount of preciousmetal. Then again both ofthe members of the ring are continuous, unsoldered bands and the ring isformed without transverse seams.

formed partly of base metal of the old construction.

Having thus described one illustrative einbodiment of my invention andthe best mode known to me for carrying :out my method, I desire it to beunderstood that although specific terms are employed, they are used in ageneric and descriptive sense and not for the purpose of limitation,,the scope of the invention being defined and limited only .by the termsof the appended claim.

I claim: The method of forming a hollow ring band which consists incutting a band from a tube applying an edgewajys pressure upon this bandby a torrnlng die bendlng it into con cave shape in cross section,securing {1, plurality of these bands at spaced apart inter vals uponatu'be then severing the tube at the edges of the outer band andfinishing the edges.

' In testimony whereof I afiix my signature in presence of one Witness.p

3 JOHN H. STONE; Witness:

HOWARD E. ,BAnLoW.

